Hmm. Maybe I should report here that with all these settings my hildon-home virtual memory size just kept getting bigger. Also opening up contacts took sometimes little too long to my taste. I ended up disabling all other tweaks expect swappiness and cache pressure. Now it seems to be ok.

.edit
swappines 30, pressure 50

..edit
looks like hildon-desktop and home are leaking for me. Probably some faulty widget or applet. I just wish that we had easy way of detecting what widgets&applets leak.